My abode is a 1930's-built bog-standard small/medium 3-bed terrace house, which has been rewired sometime in white cable. The upstairs lighting circuit is 1mm with 6amp breaker and I estimate the total circuit length as 30-35m max supplying 5 ordinary domestic ceiling lights, plus two low-watt bathroom fans which I added last year via a spur. Much of the cable is beside fibreglass wool insulation.
I am now decking-out part of my loft and want to add a couple of extra lights there by once again connecting into the upstairs light circuit. While I do the work I intend to protect as much of the entire ring as possible with loose-fit ducting to provide an air-break from the insulation.
I would like to replace the entire existing 1mm circuit with 1.5mm, but part of it is too embedded in the wall to easily do that so it's a non-starter! Therefore can anyone advise me whether I am getting too ambitious by adding to the circuit?? And, if not, would it help if I use 1.5mm cable for the 3 extra lights to lessen voltage drop? And will it be best to break into the existing circuit and extend the loop for the new lights, or merely add another 'spur'?
Advice would be much appreciated.
I am now decking-out part of my loft and want to add a couple of extra lights there by once again connecting into the upstairs light circuit. While I do the work I intend to protect as much of the entire ring as possible with loose-fit ducting to provide an air-break from the insulation.
I would like to replace the entire existing 1mm circuit with 1.5mm, but part of it is too embedded in the wall to easily do that so it's a non-starter! Therefore can anyone advise me whether I am getting too ambitious by adding to the circuit?? And, if not, would it help if I use 1.5mm cable for the 3 extra lights to lessen voltage drop? And will it be best to break into the existing circuit and extend the loop for the new lights, or merely add another 'spur'?
Advice would be much appreciated.